The Oak Ridge Boys are an American musical group. Originally a gospel quartet, The Oak Ridge Boys switched their focus to secular country music in the mid-1970s, releasing a string of hit albums and singles that lasted into the early 1990s. Their discography comprises thirty-one studio albums and fifty-six singles. Their highest-selling album is 1981's Fancy Free, which is certified double-platinum by the Recording Industry Association of America (RIAA).